CPU Running at 100 Percent

Another problem with running Compiz and Firefox appears to be full on CPU usage (100 percent). Check first to see where the problem lies by typing into a console:

top

This lists the processes in order of greediness. Usually, to solve the problem all you need do is either restart Firefox or turn off Compiz.

Firefox Covers Task Bar and Shut Down Bar Missing

There seems to be a problem running Compiz and Firefox together. At times, when expanding Firefox to fullscreen, it will expand beyond the taskbar, and the shut down/minimize bar will also appear too high up, effectively off the top of the screen, making it impossible to shut down Firefox by the usual method.

Whatever the problem is, once it's happened, it saves to the Firefox settings file, meaning the setting effectively sticks.

To remedy the problem either (a) turn off Compiz, or (b) type the following into a console:

mv ~/.mozilla ~/.mozillaold

This will rename your Firefox settings file. You will lose all of your extensions using this method, and any themes you may be using, so a re-install of them will be necessary.

Increase Amount of Workspaces in Compiz

System>Preferences>Compiz Config Settings Manager>General>General Options.

Desktop Size>Horizontal Virtual Size>**Change Number To Suit**